Koskenkorva and/or Mondbräu

At Storehouse, or at Bar the PC notices an argument of a soldier with the barkeep/quartermaster. The soldier wants to get either some real beer or real vodka for a change. Not that strange khelp-based swill (Gesöff) they serve around here. The other refuses to hand it out, because of 'strict rationing'. The Soldier then curses, and scuffles away.

The PC can catch up to him, and if he engages in a conversation, the soldier will ask him to help out.

PC can either steal or buy/bribe the real stuff at the storehouse, bar, medical, or food-facility, crates of vodka at the dry-docks (finnish labels) or he can get some alternate substance like turpentine. The 'dry' soldier will not know the difference, and will die. If you do give him the real stuff, he will get drunk, and you can get some information out of him. Also, if you give him enough, he will start to wander about aimlessly, staggering about, and burst into song.
He will hit on members of the opposite (or same) sex, then belch loudly, or mumble something unintelligible, and move on. He will bump into columns, or trashcans, and pardon himself "'tschuldigung", and eventually topple over, and fall asleep, snoring loudly.

The PC can opt to give alcohol to certain key NPCs instead, and watch the effects, however not everyone should be affected by this.